Ladder rung



FIG. 1 is a perspective view of a ladder rung;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof, in use.

The broken lines are included for the purpose of illustrating environment and form no part of the claimed design. 

CLAIM The ornamental design for a ladder rung, as shown and described. 